/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/


/*************************************************************************
 * File: string.cpp
 *************************************************************************
 *\author: starlove
 *************************************************************************/

#include <platform/platform.h>
#include <platform/string.h>

char *trim(char *str, unsigned int s)
{
    unsigned int n = 0;
    char *dst = NULL;
    do
    {
        if(isprint(*str) && !isspace(*str))
        {
            if(!dst)
            {
                dst = str;
                break;
            }
        }
        str ++;
        n ++;
    }
    while(n < s);

    if(!dst)
		dst = str;

	char *str_end = str + s - 1;
	do
	{
        if(*str_end != 0 && !isspace(*str_end))
        {
            break;
        }
        else
        {
			*str_end = 0;
        }
        str_end --;
    }
    while(str_end >= dst);
    return dst;
}
